Theoretical study of a W-band-covering frequency tunable gyrotron

Fanhong Li; Chao-hai Du; Zi-chao Gao; Shi Pan; Liang Zhang; Pu-kun Liu; K. Ronald; Adrian W. Cross

doi:10.1109/TED.2019.2957040

Theoretical study of a W-band-covering frequency tunable gyrotron

Fanhong Li, Chao-hai Du, Zi-chao Gao, Shi Pan, Liang Zhang, Pu-kun Liu, K. Ronald, Adrian W. Cross

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Abstract

The gyrotron has already demonstrated the capability of generating high-power coherent electromagnetic (EM) radiation at high frequencies and finds application in fusion plasma heating and magnetic resonance spectroscopy. In this article, we propose a W-band gyrotron, which uses a so-called multimode switching scheme to realize ultrabroadband frequency tuning capability, nearly covering about 70% of the W-band (75-110 GHz) range. The tuning strategy used to suppress mode competition and stabilize gun parameters in such an open-cavity multimode switching gyrotron is presented. Theoretical study shows that the multimode switching gyrotron can generate a frequency tuning range much wider than a conventional step-tuning gyrotron or a single-mode tuning gyrotron. In addition, another technology that uses a slot-assisted circuit to select only axis-symmetrical TE operating modes is presented. Using such a circuit, a tuning range of about 25 GHz in the W-band is obtainable. The proposed multimode switching gyrotron is a promising ultrabroadband source for millimeter-wave and terahertz-wave applications.

Original language	English
Article number	8945210
Pages (from-to)	659-666
Number of pages	8
Journal	IEEE Transactions on Electron Devices
Volume	67
Issue number	2
Early online date	30 Dec 2019
DOIs	https://doi.org/10.1109/TED.2019.2957040
Publication status	Published - 29 Feb 2020

Keywords

frequency tunable gyrotron
W-band
coherent electromagnetic (EM) radiation
broadband tuning

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10.1109/TED.2019.2957040

Li-etal-ITED2019-Theoretical-study-W-band-covering-frequency-tunable-gyrotronAccepted author manuscript, 829 KB

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1 Active

Terahertz High-Harmonic Gyrotron Oscillator By Using Metasurface Cylindrical Cavity (Newton Advanced Fellowship - Prof Chao-Hai Du)
Cross, A. & Zhang, L.
Royal Society
28/03/18 → 27/09/22
Project: Research Fellowship

Cite this

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title = "Theoretical study of a W-band-covering frequency tunable gyrotron",

abstract = "The gyrotron has already demonstrated the capability of generating high-power coherent electromagnetic (EM) radiation at high frequencies and finds application in fusion plasma heating and magnetic resonance spectroscopy. In this article, we propose a W-band gyrotron, which uses a so-called multimode switching scheme to realize ultrabroadband frequency tuning capability, nearly covering about 70% of the W-band (75-110 GHz) range. The tuning strategy used to suppress mode competition and stabilize gun parameters in such an open-cavity multimode switching gyrotron is presented. Theoretical study shows that the multimode switching gyrotron can generate a frequency tuning range much wider than a conventional step-tuning gyrotron or a single-mode tuning gyrotron. In addition, another technology that uses a slot-assisted circuit to select only axis-symmetrical TE operating modes is presented. Using such a circuit, a tuning range of about 25 GHz in the W-band is obtainable. The proposed multimode switching gyrotron is a promising ultrabroadband source for millimeter-wave and terahertz-wave applications.",

keywords = "frequency tunable gyrotron, W-band, coherent electromagnetic (EM) radiation, broadband tuning",

author = "Fanhong Li and Chao-hai Du and Zi-chao Gao and Shi Pan and Liang Zhang and Pu-kun Liu and K. Ronald and Cross, {Adrian W.}",

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AU - Li, Fanhong

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AU - Pan, Shi

AU - Zhang, Liang

AU - Liu, Pu-kun

AU - Ronald, K.

AU - Cross, Adrian W.

N1 - © © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”

PY - 2020/2/29

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N2 - The gyrotron has already demonstrated the capability of generating high-power coherent electromagnetic (EM) radiation at high frequencies and finds application in fusion plasma heating and magnetic resonance spectroscopy. In this article, we propose a W-band gyrotron, which uses a so-called multimode switching scheme to realize ultrabroadband frequency tuning capability, nearly covering about 70% of the W-band (75-110 GHz) range. The tuning strategy used to suppress mode competition and stabilize gun parameters in such an open-cavity multimode switching gyrotron is presented. Theoretical study shows that the multimode switching gyrotron can generate a frequency tuning range much wider than a conventional step-tuning gyrotron or a single-mode tuning gyrotron. In addition, another technology that uses a slot-assisted circuit to select only axis-symmetrical TE operating modes is presented. Using such a circuit, a tuning range of about 25 GHz in the W-band is obtainable. The proposed multimode switching gyrotron is a promising ultrabroadband source for millimeter-wave and terahertz-wave applications.

AB - The gyrotron has already demonstrated the capability of generating high-power coherent electromagnetic (EM) radiation at high frequencies and finds application in fusion plasma heating and magnetic resonance spectroscopy. In this article, we propose a W-band gyrotron, which uses a so-called multimode switching scheme to realize ultrabroadband frequency tuning capability, nearly covering about 70% of the W-band (75-110 GHz) range. The tuning strategy used to suppress mode competition and stabilize gun parameters in such an open-cavity multimode switching gyrotron is presented. Theoretical study shows that the multimode switching gyrotron can generate a frequency tuning range much wider than a conventional step-tuning gyrotron or a single-mode tuning gyrotron. In addition, another technology that uses a slot-assisted circuit to select only axis-symmetrical TE operating modes is presented. Using such a circuit, a tuning range of about 25 GHz in the W-band is obtainable. The proposed multimode switching gyrotron is a promising ultrabroadband source for millimeter-wave and terahertz-wave applications.

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KW - broadband tuning

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Theoretical study of a W-band-covering frequency tunable gyrotron

Abstract

Keywords

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Terahertz High-Harmonic Gyrotron Oscillator By Using Metasurface Cylindrical Cavity (Newton Advanced Fellowship - Prof Chao-Hai Du)

Cite this